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Finding the Fourth Proportional to 315,044.72, 472,424.92 and 90,353.57

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Solution

The fourth proportional to 315,044.72, 472,424.92 and 90,353.57 is: 135,489.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,044.72 : 472,424.92 = 90,353.57 : x
  2. Step 2: Convert to fraction form
    315,044.72/472,424.92 = 90,353.57/x
  3. Step 3: Cross multiply
    315,044.72x = 472,424.92 × 90,353.57
  4. Step 4: Simplify right side
    315,044.72x = 42,685,278,078.96
  5. Step 5: Solve for x
    x = 42,685,278,078.96/315,044.72
  6. Step 6: Final answer
    x = 135,489.58

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.